Changes

Disable swap in Go build
We have migrated to Go 1.7+ and as such we no longer need to be enabling 
swap space for our builds.
Signed-off-by: Steve Kuznetsov <skuznets@redhat.com>
 (commit: 82385ca)

Automatically determine which type of jUnit report to generate
We can tell from the raw test output file which type of test was used to 
create the output, so we do not need users to have to specify which type 
of parsing and report they would like.
Signed-off-by: Steve Kuznetsov <skuznets@redhat.com>
 (commit: 16ab6dd)

DRY out script cleanup code
Almost every single cleanup function trapped on exit for our scripts was 
taking the same actions in the same order. We can break that out into a 
standalone function under `hack/lib` that contains a superset of all the 
cleanup steps used, provided that we make sure each individual clean up 
step can gracefully handle the case where it is not needed or does not 
have any work to do.
Signed-off-by: Steve Kuznetsov <skuznets@redhat.com>
 (commit: 8c7f1a7)